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Notes from IoT Support: IBM Watson Internet of Things Support tips, tricks, how-tos, videos, and any other content appropriate for the IoT Support focused audience. Content delivery coordinated by Denise McKinnon.

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There is a documented procedure to install the DOORS client in silent mode and when you install a new DOORS client the old one is automatically uninstalled.

But, since the release 9.6.1, DOORS client is only a 64 bit application. That means if you have a DOORS client 32 bit installed, installing a new DOORS client 64 bit won't uninstall automatically the old release. This is a problem when you want to install DOORS in silent mode as having a DOORS client 32 bit and 64 bit installed on the same machine is unsupported by IBM.

To uninstall DOORS client 32 bit in silent mode, you need first to find the GUID of your release. To find the GUID, you can use WMIC, here is a sample script (.bat) to retrieve that information:

for /f "skip=1 delims=" %%a in (
'wmic product where "Name like 'IBM Rational DOORS 9.5%'" get IdentifyingNumber'
) do @for /f "delims=" %%b in ("%%a") do set GUID=%%b

In this example, I am trying to find the GUID of a DOORS 9.5 client.

Once you get the GUID, you can use this command to uninstall your DOORS client: